40 CFR § 721.10809 - Cyclotetrasiloxane, 2,4,6,8-tetrakis[3-[2-(2-methoxyethoxy)ethoxy]propyl]-2,4,6,8-tetramethyl-.

---
identifier: "/us/cfr/t40/s721.10809"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 721.10809 - Cyclotetrasiloxane, 2,4,6,8-tetrakis[3-[2-(2-methoxyethoxy)ethoxy]propyl]-2,4,6,8-tetramethyl-."
title_number: 40
title_name: "Protection of Environment"
section_number: "721.10809"
section_name: "Cyclotetrasiloxane, 2,4,6,8-tetrakis[3-[2-(2-methoxyethoxy)ethoxy]propyl]-2,4,6,8-tetramethyl-."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "R"
subchapter_name: "TOXIC SUBSTANCES CONTROL ACT"
part_number: "721"
part_name: "SIGNIFICANT NEW USES OF CHEMICAL SUBSTANCES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 2604, 2607, and 2625(c)."
regulatory_source: "49 FR 35018, Sept. 5, 1984, unless otherwise noted."
cfr_part: "721"
---


# 721.10809 Cyclotetrasiloxane, 2,4,6,8-tetrakis[3-[2-(2-methoxyethoxy)ethoxy]propyl]-2,4,6,8-tetramethyl-.

(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance identified as cyclotetrasiloxane, 2,4,6,8-tetrakis[3-[2-(2-methoxyethoxy)ethoxy]propyl]-2,4,6,8-tetramethyl- (PMN P-14-518; CAS No. 17232-95-0) is subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section.

(2) The significant new uses are:

(i) *Release to water.* Requirements as specified in § 721.90(a)(4), (b)(4), and (c)(4) (N = 8).

(ii) [Reserved]

(b) *Specific requirements.* The provisions of subpart A of this part apply to this section except as modified by this paragraph (b).

(1) *Recordkeeping.* Recordkeeping requirements as specified in § 721.125 (a), (b), (c), and (k) are applicable to manufacturers and processors of this substance.

(2) *Limitations or revocation of certain notification requirements.* The provisions of § 721.185 apply to this section.

[80 FR 5470, Feb. 2, 2015]